Research Article

Switchgrass Cultivar/Ecotype Selection and Management for Biofuels in the Upper Southeast USA

Table 5

Effect of management (one-cut (low input and management) and two-cut (high input and management)), year, and cultivar on yield of switchgrass grown at eight locations in upper southeast USA (CIR: Cave-in-Rock).

Cuttings/NYearCultivarLocation1Mean
KYNCTN1TN2VA1VA2VA3WV

Yield (Mg/ha)
One/50 kg2000Alamo15.514.77.820.89.517.119.815.515.14.5
Kanlow16.414.811.015.511.118.916.618.315.33.7
CIR10.110.58.314.414.211.915.013.612.23.1
Shelter8.48.37.911.810.312.011.212.810.33.0
Mean12.612.18.715.611.315.015.615.113.22.0
2.33.72.83.14.24.95.23.41.4
2001Alamo13.67.411.624.910.627.417.618.216.44.9
Kanlow14.86.912.722.413.722.220.020.516.85.3
CIR13.26.28.213.89.618.412.615.712.23.6
Shelter10.65.18.711.29.711.712.216.710.73.4
Mean13.16.410.318.110.919.915.617.814.02.4
3.11.83.04.73.68.06.43.21.7
Mean12.89.29.516.911.117.415.616.413.62.1
Two/100 kg2000Alamo17.016.710.216.915.822.420.415.216.84.6
Kanlow15.815.711.714.116.121.319.415.416.23.7
CIR13.416.714.216.717.220.519.616.416.83.3
Shelter11.413.99.814.216.817.415.714.314.23.6
Mean14.415.711.515.516.520.418.715.316.01.8
2.51.9NS51.9NS3.2NS0.81.2
2001Alamo15.29.716.617.913.719.715.113.015.14.6
Kanlow14.79.115.515.016.519.914.213.814.84.4
CIR13.610.216.917.014.616.715.515.715.13.4
Shelter10.78.812.915.213.218.013.614.713.43.0
Mean13.69.515.516.314.518.614.614.314.61.9
1.7NSNS2.43.2NSNS1.41.3
Mean14.012.613.515.915.519.516.714.815.30.9

NS1.91.7NS1.2NSNS1.21.3

Locations: KY (Princeton), NC (Raleigh), TN1 (Jackson), TN2 (Knoxville), VA1,2 (Blacksburg), VA3 (Orange), and WV (Morgantown); 2LSD for comparison of cultivars within cutting, year, and location; 3LSD for comparison of locations within a management, year, and cultivar; 4LSD for comparison of means between managements; 5NS: not significant.